package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.apache.commons.lang3.StringUtils;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {


    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 根据日期查营业额
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> details=new ArrayList<>();
        details.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            details.add(begin);

        }

        List<Double> turnoverlist=new ArrayList<>();
        for (LocalDate detail : details) {
            LocalDateTime beginTime=LocalDateTime.of(detail, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(detail, LocalTime.MAX);
            int completed = Orders.COMPLETED;

            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",completed);

            Double turnover=orderMapper.turnoverStatistics(map);
            if (turnover==null){
                turnover = 0.0;
            }
            turnoverlist.add(turnover);
        }



        TurnoverReportVO turnoverReportVO =TurnoverReportVO.builder()
                .dateList(StringUtils.join(details,","))
                .turnoverList(StringUtils.join(turnoverlist,","))
                        .build();

        return turnoverReportVO;

    }

    /**
     * 根据日期统计用户数据
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> totalUserList=new ArrayList<>();
        List<Integer> newUserList=new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime =LocalDateTime.of(date,LocalTime.MAX);

            Map map=new HashMap<>();

            map.put("end",endTime);
            Integer totalUser= userMapper.countByMap(map);

            map.put("begin",beginTime);

            Integer newUser= userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }
        UserReportVO userReportVO=UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
        return userReportVO;
    }

    /**
     * 订单统计接口
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList =new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime =LocalDateTime.of(date,LocalTime.MAX);
            Integer completed =5;
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);

            Integer orderCount =orderMapper.getOrderCount(map);
            orderCountList.add(orderCount);
            map.put("status",completed);
            Integer validOrderCount= orderMapper.getOrderCount(map);
            validOrderCountList.add(validOrderCount);
        }

        Integer TotalOrderCount=orderCountList.stream().reduce(Integer::sum).get();

        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate=0.0;
        if (TotalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/TotalOrderCount;
        }

        OrderReportVO orderReportVO=OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(TotalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
        return orderReportVO;
    }

    /**
     * 查询销量排名top10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime =LocalDateTime.of(end,LocalTime.MIN);
        List<GoodsSalesDTO> goodsSalesDTOList =orderMapper.getSalesTop(beginTime,endTime);

        List<String> nameList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());


        SalesTop10ReportVO salesTop10ReportVO=SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
        return salesTop10ReportVO;
    }

    /**
     * 导出Excel报表接口
     * @param httpServletResponse
     */
    public void exportBusinessData(HttpServletResponse httpServletResponse) {
        //1.查数据库

        LocalDate beginTime= LocalDate.now().minusDays(30);
        LocalDate endTime= LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(beginTime, LocalTime.MIN), LocalDateTime.of(endTime, LocalTime.MAX));


        //2.POI写数据
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间"+beginTime+"至"+endTime);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = beginTime.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = httpServletResponse.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
